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final matrix

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Replace R2 by R2 + (-7)R1

1 8 -6 -8

7 5 9 3

-5 1 7 5

R2 + (-7)R1=

(what is the final matrix)

 
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system of equations associated with the augmented matrix.

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Write the system of equations associated with the augmented matrix.

5 -3 5 4

5 5 3 -6

3 3 4 3

The first equation is 5x – 3y + __z = 4

 
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augmented matrix

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Find the augmented matrix for the following system of equations.

x – y + 6z = -6

7x – 7y + 6z = 1

7y – 6z = -1

The entries in the matrix are:

 
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three convenience stores in Gambier.

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There are three convenience stores in Gambier. This​ week, Store I sold 84 loaves of​ bread, 48 quarts of​ milk, 16 jars of peanut​ butter, and 112 pounds of cold cuts. Store II sold 105 loaves of​ bread, 72 quarts of​ milk, 21 jars of peanut​ butter, and 150 pounds of cold cuts. Store III sold 70 loaves of​ bread, 30 quarts of​ milk, no peanut​ butter, and 50 pounds of cold cuts. Complete parts​ (a) through​ (c) below.

​(a) Use a 3×4 matrix to express the sales information for the three stores.

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